How to subtract a number + how to have multiple

Help Requests
1

I’m making a cookie clicker game. http://flowlab.io/game/view/121357 I can’t figure out how to subtract 15 cookies when you click on the cursor, or how to have multiple cursors going at once. The mechanics are too much for me xD

2

Nice i like the pictures

3

They’re totally not off google images… O.O